My screen turn black and white after I log in windows (no more colors)...help!

I have the latest video driver. Installed them a week ago. This morning my gf used the computer and forgot to plug in the power so the computer shut down when there was no power. At noon, I plugged the power in and started the computer. I never logged in. There is color on my screen. My vista 64 bit logging is in color. When it logs in and the desktop starts to appear, it's already black and white. So I'd guess the problem would be windows since my screen has color until windows starts loading after I log in.

I'm trying to figure out this problem (with google as I do all my problems) but this time, I can't just find the problem.